五氮杂菲衍生物（5AP-N(C12)2）中的倒置单三重激发态

IF 5.6 Q2 MATERIALS SCIENCE, BIOMATERIALS ACS Applied Bio Materials Pub Date : 2024-05-21 DOI:10.35848/1882-0786/ad4e96

Y. Kusakabe, Katsuyuki Shizu, Hiroyuki Tanaka, Kazuo Tanaka, H. Kaji

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引用次数: 0

摘要

在一种二烷基胺取代的五氮杂萘衍生物 5AP-N(C12)2 中观察到了倒置单三重激发态（iST）的特征，即最低单激发态（S1）的能量低于最低三重态（T1）的能量。瞬态聚光测量结果表明，反向系统间交叉的活化能几乎为零，而系统间交叉则是通过热活化过程进行的。T1 的能量高于 S1，S1 和 T1 之间的负能隙（ΔE ST）为 -37 meV。荧光和磷光光谱也证实了负 ΔE ST 为 -46 - -32 meV。

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An inverted singlet-triplet excited state in a pentaazaphenalene derivative (5AP-N(C12)2)

The characteristic of inverted singlet-triplet excited states (iST), in which the lowest singlet excited state (S1) is lower than the lowest triplet state (T1) in energy, was observed in a dialkylamine-substituted pentaazaphenalene derivative, 5AP-N(C12)2. The transient PL measurements showed that the reverse intersystem crossing has virtually zero activation energy, whereas the intersystem crossing proceeded by a thermal activation process. T1 was located energetically above S1 with the negative energy gap between S1 and T1 (ΔE ST) of −37 meV. Fluorescence and phosphorescence spectra also confirmed the negative ΔE ST of −46 – −32 meV.

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来源期刊

ACS Applied Bio Materials Chemistry-Chemistry (all)

CiteScore

9.40

自引率

2.10%

发文量

464

期刊介绍： ACS Applied Bio Materials is an interdisciplinary journal publishing original research covering all aspects of biomaterials and biointerfaces including and beyond the traditional biosensing, biomedical and therapeutic applications. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important bio applications. The journal is specifically interested in work that addresses the relationship between structure and function and assesses the stability and degradation of materials under relevant environmental and biological conditions.